12209233 has 2 divisors, whose sum is σ = 12209234. Its totient is φ = 12209232.

The previous prime is 12209207. The next prime is 12209269. The reversal of 12209233 is 33290221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12054784 + 154449 = 3472^2 + 393^2 .

It is a cyclic number.

It is not a de Polignac number, because 12209233 - 2¹³ = 12201041 is a prime.

It is equal to p₈₀₀₈₅₁ and since 12209233 and 800851 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12209273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6104616 + 6104617.

It is an arithmetic number, because the mean of its divisors is an integer number (6104617).

Almost surely, 2^12209233 is an apocalyptic number.

It is an amenable number.

12209233 is a deficient number, since it is larger than the sum of its proper divisors (1).

12209233 is an equidigital number, since it uses as much as digits as its factorization.

12209233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 12209233 is about 3494.1712894476. The cubic root of 12209233 is about 230.2658111461.

Subtracting from 12209233 its sum of digits (22), we obtain a triangular number (12209211 = T₄₉₄₁).

Adding to 12209233 its reverse (33290221), we get a palindrome (45499454).

The spelling of 12209233 in words is "twelve million, two hundred nine thousand, two hundred thirty-three".